This paper will present the Cassini Ion Neutral Mass Spectrometer findings on the composition and structure of the upper atmosphere of Titan and the Enceladus cryo-geyser. Challenges of performing mass spectrometry in the harsh environment of space will be discussed. Emphasis will be placed on the rich organic chemsitry found at both Titan and Enceladus. The two chemistries will be compared and contrasted with respect to origin and evolution. Ion neutral chemistry taking place in the upper atmosphere of Titan will be presented including the roll of neutral, positive ion, and negative ion and their interplay to produce compex organic compounds exceeding 5000 u.   Enceladus in contrast was formed from ices in the solar nebula with similar composition to comets and subsequently modified by warm aqueous processes in the interior of Enceladus.   Both chemistries will be compared to that of the interstellar medium. Laboratory studies that are contributing to our understanding of these chemical processes will be discussed.

Organic chemistry in the Kronian satellite system: Titan and Enceladus

246th National Meeting (2013)

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